Finding the Fourth Proportional to 16,139.39, 24,215.90 and 12,448.82

Step by Step Solution

1. Step 1: Write the proportion equation
   16,139.39 : 24,215.90 = 12,448.82 : x
2. Step 2: Convert to fraction form
   16,139.39/24,215.90 = 12,448.82/x
3. Step 3: Cross multiply
   16,139.39x = 24,215.90 × 12,448.82
4. Step 4: Simplify right side
   16,139.39x = 301,459,378.53
5. Step 5: Solve for x
   x = 301,459,378.53/16,139.39
6. Step 6: Final answer
   x = 18,678.49